EP 0140962 B1 19870826 - VOLTAGE CONVERTER
Title (en)
VOLTAGE CONVERTER
Publication
Application
Priority
JP 7154983 A 19830425
Abstract (en)
[origin: WO8404431A1] A self-excited switching D.C. stabilized power supply includes a switching transistor (88) and the primary winding (92) of a transformer (90) which are wired in series across first and second input terminals (72, 74) of the power supply. A secondary winding (94) of the transformer (90) is coupled to first and second output terminals (76, 78) of the power supply by means of a diode (96) which, when forward biased, transmits the D.C. signal to a variable load. A feedback circuit which includes a photocoupler (118) is connected to the output terminals (76, 78) of the power supply for delaying the switching of the transistor (88) in accordance with the load requirements to provide a quiescent period in the switching period of the transistor (88), during which time the transistor (88) and the diode (96) are in a non-conducting state. The on period of the switching transistor (88) and the quiescent period are varied in accordance with the load to stabilize the switching frequency of the transistor (88).
IPC 1-7
IPC 8 full level
H02M 3/338 (2006.01)
CPC (source: EP US)
H02M 3/3385 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8404431 A1 19841108; CA 1205131 A 19860527; DE 3465669 D1 19871001; EP 0140962 A1 19850515; EP 0140962 B1 19870826; JP S59201675 A 19841115; US 4573112 A 19860225
DOCDB simple family (application)
US 8400622 W 19840424; CA 452604 A 19840424; DE 3465669 T 19840424; EP 84901901 A 19840424; JP 7154983 A 19830425; US 58437784 A 19840228